Self-Colour Butt Hinge 50 x 28mm 2 Pack (24401)

Hello, This hinge would require countersunk screws with a diameter of 4mm/ 8GA. The length you require depends entirely on the thickness of the surface you are screwing them into and how much weight you will be hanging on the hinge (for larger weights it's advisable to opt for a longer screw). You will also need to consider what material of screw to use. If the hinges are going to be installed somewhere that is exposed to moisture/water then you need to be wary of the possibility of corrosion (i.e brass + zinc + water = corrosion). Ideally you want to opt for a brass plated screw to avoid corrosion (if the hinge is being installed somewhere it might get wet) We sell two different brass screws, 68026 and 81031. Thanks for using Q&A

No, the answer from Screwfix is wrong. They are 50mm x 29mm when open, 50mm x 17mm when closed. Sadly therefore useless for what I wanted. Note they only have three screw holes on each leaf, all in line, rather than four; the illustration is of a different product. They are however of good quality.

Hello Tinyshed, these require 4mm or 8GA screws thank you for using Q and A.JB